""" ==================== Annotate polar plots ==================== This example shows how to create an annotation on a polar graph. For a complete overview of the annotation capabilities, also see the :ref:`annotations`. .. redirect-from:: /gallery/pyplots/annotation_polar """ import matplotlib.pyplot as plt import numpy as np fig = plt.figure() ax = fig.add_subplot(projection='polar') r = np.arange(0, 1, 0.001) theta = 2 * 2*np.pi * r line, = ax.plot(theta, r, color='#ee8d18', lw=3) ind = 800 thisr, thistheta = r[ind], theta[ind] ax.plot([thistheta], [thisr], 'o') ax.annotate('a polar annotation', xy=(thistheta, thisr), # theta, radius xytext=(0.05, 0.05), # fraction, fraction textcoords='figure fraction', arrowprops=dict(facecolor='black', shrink=0.05), horizontalalignment='left', verticalalignment='bottom', ) plt.show() # %% # # .. admonition:: References # # The use of the following functions, methods, classes and modules is shown # in this example: # # - `matplotlib.projections.polar` # - `matplotlib.axes.Axes.annotate` / `matplotlib.pyplot.annotate`